http://www.cfsnet.co.uk/ Works out to around £6 per kg of regular resin. Low cost (dirty colour, bubbly) is available and clear/waterclear is more expensive. I got a barrel of the low-cost resin and it was ugly but worked fine for gifting purposes. The regular resin isn't clear but looks fine with pigment or powders added. They also sell pigments, metal powders other equipment for pouring also.